Vacuum-assisted consolidation of a hydraulic landfill

A. Jacob, S. Thevanayagam, E. Kavazanjian

Research output: Chapter in Book/Report/Conference proceedingConference contribution

22 Scopus citations


As part of the Pier 300 42-acre site ground modification project, a field test of vacuum-assisted preconsolidation of hydraulic fill was studied. The objective of the test was to assess the feasibility of this technology as an alternative or supplement to conventional surcharge techniques for ground improvement of future hydraulic fill sites at the port of Los Angeles. The test section was about 30×30 m2 consisting of prefabricated wick drains capped with a geomembrane, a slotted pipe collector system embedded in a sand blanket beneath the geomembrane, an anchor trench and protective cover medium for the membrane, and a vacuum pump. Instrumentation included high air-entrainment piezometers to measure negative pore pressures, monitoring of the ground surface settlement and multi-point borehole extensometers for deep settlement measurements. Results indicate that, due to less than optimum site conditions, the efficiency of vacuum consolidation was about 50 percent, or equivalent to about 3 meter of surcharge fill at the test site. Under better conditions or with a more effective membrane seal, higher efficiency and greater equivalent surcharge heights can be achieved, making vacuum-assisted consolidation an economically viable alternative or supplement to mechanical surcharges.

Original languageEnglish (US)
Title of host publicationGeotechnical Special Publication
EditorsAlbert T. Yeung, Guy Y. Felio
PublisherPubl by ASCE
Number of pages13
ISBN (Print)078440027X
StatePublished - Jan 1 1994
Externally publishedYes
EventProceedings of the Conference on Vertical and Horizontal Deformations of Foundations and Embankments. Part 2 (of 2) - College Station, TX, USA
Duration: Jun 16 1994Jun 18 1994

Publication series

NameGeotechnical Special Publication
ISSN (Print)0895-0563


OtherProceedings of the Conference on Vertical and Horizontal Deformations of Foundations and Embankments. Part 2 (of 2)
CityCollege Station, TX, USA

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology


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